mirror of https://github.com/PCSX2/pcsx2.git
32 lines
735 B
C++
32 lines
735 B
C++
#include <stdio.h>
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#include <memory.h>
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#include <malloc.h>
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#include "vl.h"
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void cpu_physical_memory_rw(uint32_t addr, uint8_t *buf,
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int len, int is_write);
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/* compute with 96 bit intermediate result: (a*b)/c */
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uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c)
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{
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union {
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uint64_t ll;
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struct {
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#ifdef WORDS_BIGENDIAN
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uint32_t high, low;
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#else
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uint32_t low, high;
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#endif
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} l;
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} u, res;
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uint64_t rl, rh;
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u.ll = a;
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rl = (uint64_t)u.l.low * (uint64_t)b;
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rh = (uint64_t)u.l.high * (uint64_t)b;
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rh += (rl >> 32);
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res.l.high = rh / c;
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res.l.low = (((rh % c) << 32) + (rl & 0xffffffff)) / c;
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return res.ll;
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}
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